import axios from "axios";
import { Notification, MessageBox, Message, Loading } from "element-ui";
import store from "@/store";
import { getToken } from "@/utils/auth";
import errorCode from "@/utils/errorCode";
const city_name = window.city_name;
import _ from "lodash";
axios.defaults.headers["Content-Type"] = "application/json";
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 20000,
});

//loading对象
let loading;

//当前正在请求的数量
let needLoadingRequestCount = 0;

//显示loading
function showLoading(target) {
  // 后面这个判断很重要，因为关闭时加了抖动，此时loading对象可能还存在，
  // 但needLoadingRequestCount已经变成0.避免这种情况下会重新创建个loading
  if (needLoadingRequestCount === 0 && !loading) {
    loading = Loading.service({
      lock: true,
      text: "Loading...",
      background: "rgba(255, 255, 255, 0.5)",
      target: target || "body",
    });
  }
  needLoadingRequestCount++;
}

//隐藏loading
function hideLoading() {
  needLoadingRequestCount--;
  needLoadingRequestCount = Math.max(needLoadingRequestCount, 0); //做个保护
  if (needLoadingRequestCount === 0) {
    //关闭loading
    toHideLoading();
  }
}
//防抖：将 300ms 间隔内的关闭 loading 便合并为一次。防止连续请求时， loading闪烁的问题。
var toHideLoading = _.debounce(() => {
  loading && loading.close();
  loading = null;
}, 700);

// request拦截器
service.interceptors.request.use(
  (config) => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false;
    if (getToken() && !isToken) {
      config.headers["Authorization"] = getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
    }
    //判断当前请求是否设置了不显示Loading
    if (config.headers.showLoading == true) {
      showLoading(config.headers.loadingTarget);
    }
    // get请求映射params参数
    if (config.method === "get" && config.params) {
      let url = config.url + "?";
      for (const propName of Object.keys(config.params)) {
        const value = config.params[propName];
        var part = encodeURIComponent(propName) + "=";
        if (value !== null && typeof value !== "undefined") {
          if (typeof value === "object") {
            for (const key of Object.keys(value)) {
              let params = propName + "[" + key + "]";
              var subPart = encodeURIComponent(params) + "=";
              url += subPart + encodeURIComponent(value[key]) + "&";
            }
          } else {
            url += part + encodeURIComponent(value) + "&";
          }
        }
      }
      url = url.slice(0, -1);
      config.params = {};
      config.url = url;
    }
    return config;
  },
  (error) => {
    //判断当前请求是否设置了不显示Loading
    if (config.headers.showLoading == true) {
      hideLoading();
    }
    console.log(error);
    Promise.reject(error);
  }
);

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    //判断当前请求是否设置了不显示Loading（不显示自然无需隐藏）
    if (res.config.headers.showLoading == true) {
      hideLoading();
    }
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode["default"];
    if (code === 401) {
      MessageBox.confirm(
        "登录状态已过期，您可以继续留在该页面，或者重新登录",
        "系统提示",
        {
          confirmButtonText: "重新登录",
          cancelButtonText: "取消",
          type: "warning",
        }
      )
        .then(() => {
          store.dispatch("LogOut").then(() => {
            location.href = city_name == "dwdt" ? "/wycms/index" : "/index";
          });
        })
        .catch(() => {});
    } else if (code === 500) {
      Message({
        message: msg,
        type: "error",
      });
      return Promise.reject(new Error(msg));
    } else if ([203, 10000].indexOf(code) > -1) {
      // 203 "请验证安全问题"  双因子认证
      // 10000 验证视频存在
      return res.data;
    } else if (code !== 200) {
      Notification.error({
        title: msg,
      });
      return Promise.reject("error");
    } else {
      return res.data;
    }
  },
  (error) => {
    console.log("err" + error);
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else if (message.includes("Request failed with status code")) {
      message = "系统接口" + message.substr(message.length - 3) + "异常";
    }
    Message({
      message: message,
      type: "error",
      duration: 5 * 1000,
    });
    return Promise.reject(error);
  }
);

export default service;
